Safflower is an oilseed plant rich source of omega 3 and 6 whose fatty acids composition may be affected by water deficit stress. Thus, filed experiments were conducted in Tehran, Iran during 2017 and 2018 growing seasons to investigate the influence of foliar application polyamines on fatty acid compositions and agronomic traits under deficit irrigation stress as a split plot with four replications. The studied treatments included irrigation at two levels of normal irrigation (I1, 50 %) and deficit irrigation at flowering stage (I2, 75 %) (irrigation after depletion of 50 % and 75 % moisture of field capacity, respectively) as the main plot and foliar application treatments at 10 levels included (water foliar application or control, foliar application putrescine, spermidine and spermine each in concentrations (50, 100, 200 μmol L⁻¹)) as the subplot. Foliar application of putrescine under I2 enhanced grain and oil yield by 721.7 and 120.7 kg ha^-1, respectively, on average in the two years of experiment compared with the control treatment. The total polyunsaturated and unsaturated fatty acids (∑PUFA and ∑UFA), UFA (omega 3 and 6), ratio of ∑PUFA to saturated fatty acids (∑SFA), harvest index and oil content rose under I2 conditions in both years of the experiment with spermine foliar application. Foliar application of putrescine also increased omega 6, ∑PUFA and ∑UFA under I1 conditions in both years. The results of this experiment indicate that foliar application of polyamines can improve grain and oil yield and quality of fatty acids of safflower under irrigation regimes.

红花是富含油籽的欧米茄3和6的来源，其脂肪酸组成可能受缺水胁迫的影响。因此，在2017年和2018年生长季期间，在伊朗德黑兰进行了田野试验，以研究在缺水灌溉胁迫下叶面施用多胺对脂肪酸组成和农艺性状的影响，以四重复的分割图的形式。研究的处理方法包括以正常灌溉水平的两个灌溉水平（I1，50％）和开花期灌溉不足的灌溉水平（I2，75％）（分别枯竭50％和75％的田间持水量后灌溉）作为主要区域以及10种水平的叶面施药处理（水叶面施药或对照，叶面施腐胺，亚精胺和亚精胺的浓度分别为（50、100、200μmolL^-1））作为子图。与对照相比，在I2下叶面喷施腐胺在两年的试验中平均平均分别提高了谷物产量和油脂产量721.7和120.7 kg ha ^-1。在I2条件下，在这两个年份的I2条件下，总多不饱和和不饱和脂肪酸（∑PUFA和∑UFA），UFA（ω3和6），∑PUFA与饱和脂肪酸的比率（∑SFA），收获指数和含油量均上升。用精胺叶面试验。在这两年中，叶绿素的叶面施用也增加了I1条件下的ω6，∑PUFA和∑UFA。实验结果表明，在灌溉条件下，叶面施用多胺可以提高籽粒和油脂的产量以及红花脂肪酸的质量。